55161 has 12 divisors (see below), whose sum is σ = 82992. Its totient is φ = 36612.

The previous prime is 55147. The next prime is 55163. The reversal of 55161 is 16155.

55161 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 55161 - 2¹¹ = 53113 is a prime.

55161 is an undulating number in base 14.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55161.

It is not an unprimeable number, because it can be changed into a prime (55163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130 + ... + 356.

It is an arithmetic number, because the mean of its divisors is an integer number (6916).

2⁵⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

55161 is a deficient number, since it is larger than the sum of its proper divisors (27831).

55161 is an equidigital number, since it uses as much as digits as its factorization.

55161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 230 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 55161 is about 234.8637903126. The cubic root of 55161 is about 38.0665960551.

It can be divided in two parts, 55 and 161, that added together give a cube (216 = 6³).

The spelling of 55161 in words is "fifty-five thousand, one hundred sixty-one".